NATURAL HISTORY · CATALOGUE RECORD
Gracile Atlantic Spiny-rat
Trinomys gratiosus (Moojen, 1948)
Source-backed taxonomic record
Accepted species in Catalogue of Life’s 11 September 2026 base release. This preserves the source classification and available supporting data; it is not a completed species monograph.
Open encyclopedia reference
Trinomys gratiosus is a species in the mainly South American family Echimyidae, the spiny rats; it occurs in southeast Brazil from the south bank of the River Doce, Espirito Sante, southward to Teresopolis, Rio de Janeiro.
Wikipedia contributors, Gracile Atlantic spiny rat; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T11:27:14.759475+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Trinomys gratiosus (Moojen, 1948)
- Name authority
- (Moojen, 1948)
- Common name
- Gracile Atlantic Spiny-rat
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Mammalia
- Order
- Rodentia
- Family
- Echimyidae
- Genus
- Trinomys
- Extinction status
- Recorded extant
Classification family tree
Nested taxonomic groups from the source. This is not a direct-ancestor chain, a dated evolutionary tree or a phylogenetic reconstruction.
- domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
- kingdomAnimalia
- phylumChordata
- subphylumVertebrata
- infraphylumGnathostomata
- parvphylumOsteichthyes
- megaclassTetrapoda
- classMammalia Linnaeus, 1758
- subclassTheria Parker & Haswell, 1897
- infraclassEutheria Gill, 1872
- orderRodentia Bowdich, 1821
- suborderHystricomorpha Brandt, 1855
- infraorderHystricognathi Brandt, 1855
- familyEchimyidae Gray, 1825
- subfamilyEuryzygomatomyinae Fabre, Upham, Emmons, Justy, Leite, Loss, Orlando, Tilak, Patterson & Douzery, 2016
- genusTrinomys Thomas, 1921
- speciesTrinomys gratiosus (Moojen, 1948)
Close classified relatives
These entries share the source’s genus, Trinomys. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Elias' Atlantic Spiny-ratTrinomys eliasi (Pessôa & Reis, 1993) | EchimyidaeChordata | Accepted speciesRecorded extant |
| Dark-caped Atlantic Spiny-ratTrinomys mirapitanga Lara, Patton & Hingst-Zaher, 2002 | EchimyidaeChordata | Accepted speciesRecorded extant |
| Rigid-spined Atlantic Spiny-ratTrinomys paratus (Moojen, 1948) | EchimyidaeChordata | Accepted speciesRecorded extant |
| Rio de Janeiro Spiny-ratTrinomys dimidiatus (Günther, 1877) | EchimyidaeChordata | Accepted speciesRecorded extant |
| Moojen's Atlantic Spiny-ratTrinomys moojeni (Pessôa, Oliveira & Reis, 1992) | EchimyidaeChordata | Accepted speciesRecorded extant |
| Elegant-spined Atlantic Spiny-ratTrinomys setosus (Desmarest, 1817) | EchimyidaeChordata | Accepted speciesRecorded extant |
| Yonenaga's Atlantic Spiny-ratTrinomys yonenagae Rocha, 1995 | EchimyidaeChordata | Accepted speciesRecorded extant |
Documented distribution
Source distribution statements, not a complete range map. A listed locality is not necessarily a place of origin.
Source literature & publication evidence
References attached to this source record, including nomenclatural citations where supplied. This is a selected bibliography; abbreviated citations remain in the source’s form.
- https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=825377 Source fields: Taxon.tsv dwc:namePublishedIn, Taxon.tsv dcterms:references
Origins, evidence & remaining research
Name authority and publication references document nomenclature where the source supplies it. They do not establish evolutionary origins or the earliest fossil occurrence.
Specimen-level evidence, morphology, ecological research, phylogenetic studies, a comprehensive bibliography and a located literary passage have not yet been compiled for this record. A suitable sourced image remains to be added.
Dataset citation & attribution
This exact taxon in ChecklistBank · Catalogue of Life 2026-09-11
Catalogue of Life 2026-09-11; dataset 316321; doi:10.48580/dgz5n. https://creativecommons.org/licenses/by/4.0/ . Retrieved 5 October 2026.
Stable key: col:58VMD. Classification follows source parent identifiers. English common names may vary by region.